Specifications

PRODUCT SPECIFICATIONS Split System Heat Pump: R4H4
4 428 65 6008 00
Specifications subject to change without notice.
CHARGING SUBCOOLING (TXV−TYPE EXPANSION DEVICE)
UNIT SIZE-SERIES REQUIRED SUBCOOLING °F (°C)
18 11 (6.1)
24 11 (6.1)
30 10 (5.6)
36 10 (5.6)
42 10 (5.6)
48 14 (7.7)
60 15 (8.3)
HP ONLY REPLACEMENT WITH PISTON INDOORS
When the R4H4 is used as a replacement component in a system with a piston fan coil, use the indoor piston size specified below:
UNIT SIZE
PISTON SIZE
FEM4P FMA4 FM(C,U)4P
18 0.052 0.050 0.050
24 0.057 0.057 0.056
30 0.067 0.070 0.067
36 0.070 0.072 0.069
42 0.078
48 0.084
60
VAPOR LINE SIZING AND COOLING CAPACITY LOSS
Acceptable vapor line diameters provide adequate oil return to the compressor while avoiding excessive capacity loss. The suction line
diameters shown in the chart below are acceptable for HP systems with R−410A refrigerant:
Vapor Line Sizing and Cooling Capacity Losses − R−410A Refrigerant 1− Stage Heat Pump Applications
Unit Nominal Size
(Btuh)
Acceptable Vapor
Line Diameters
(In. OD)
Cooling Capacity Loss (%)
Total Equivalent Line Length (ft)
Standard Application Long Line Application Requires Accessories
25
(7.62)
50
(15.2)
80
(24.4)
80+
(24.4+)
100
(30.48)
125
(38.10)
150
(45.72)
175
(53.34)
200
(60.96)
225
(68.58)
250
(76.20)
18000
1-Stage HP
1/2 1 2 3 3 4 6 7 8 9 10 12
5/8 0 0 1 1 1 1 2 2 3 3 3
24000
1-Stage HP
5/8 0 1 1 1 2 3 3 4 4 5 6
3/4 0 0 0 0 0 1 1 1 1 1 2
30000
1-Stage HP
5/8 1 2 3 3 3 4 5 6 7 8 9
3/4 0 0 1 1 1 1 2 2 2 3 3
7/8 0 0 0 0 0 1 1 1 1 1 1
36000
1-Stage HP
5/8 1 2 4 4 5 6 7 9 10 11 13
3/4 0 0 1 1 1 2 2 3 3 4 4
7/8 0 0 0 0 0 1 1 1 1 2 2
42000
1-Stage HP
3/4 0 1 2 2 2 3 4 4 5 6 6
7/8 0 0 1 1 1 1 2 2 2 3 3
48000
1-Stage HP
3/4 0 1 2 2 3 4 5 5 6 7 8
7/8 0 0 1 1 1 2 2 2 3 3 4
60000
1-Stage R-410A HP
3/4 1 2 4 4 5 6 7 9 10 11 12
7/8 0 1 2 2 2 3 4 4 5 5 6
1 1/8 0 0 0 0 1 1 1 1 1 1 2
Standard Length = 80 ft. (24.4 m) or less total equivalent length
Applications in this area are long line. Accessories are required as shown recommended on Long Line Application Guidelines
Applications in this area may have height restrictions that limit allowable total equivalent length, when outdoor unit is below indoor unit See Long Line Application Guide
lines
REFRIGERANT PIPING LENGTH LIMITATIONS
Maximum Line Lengths:
The maximum allowable total equivalent length for heat pumps varies depending on the vertical separation. See the tables below for
allowable lengths depending on whether the outdoor unit is on the same level, above or below the outdoor unit.
Maximum Line Lengths for Heat Pump Applications
MAXIMUM ACTUAL LENGTH
ft (m)
MAXIMUM EQUIVALENT LENGTH{
ft (m)
MAXIMUM VERTICAL
SEPARATION ft (m)
Units on equal level 200 (61) 250 (76.2) N/A
Outdoor unit ABOVE
indoor unit
200 (61) 250 (76.2) 200 (61)
Outdoor unit BELOW
indoor unit
See Table 'Maximum Total Equivalent Length: Outdoor Unit BELOW Indoor Unit'
{ Total equivalent length accounts for losses due to elbows or fitting. See the Long Line Guideline for details.